Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5696998 | Optical apparatus equipped with sight line detector | Akira Yamada, Keiji Nagata, Akihiko Nagano | 1997-12-09 |
| 5692222 | Camera having focus detection device | Akira Yamada, Akihiko Nagano | 1997-11-25 |
| 5634141 | Visual axis detection device capable of reducing detection errors due to variations of eyes among individuals | Akira Akashi, Akira Yamada, Akihiko Nagano | 1997-05-27 |
| 5610681 | Optical eye-control apparatus | Akihiko Nagano, Akira Yamada | 1997-03-11 |
| 5600399 | Optical apparatus and camera for controlling a plurality of functions by using a visual axis | Akira Yamada, Akihiko Nagano | 1997-02-04 |
| 5589908 | Control for variable magnification in an imaging apparatus | — | 1996-12-31 |
| 5579079 | Optical apparatus equipped with sight line detector | Akira Yamada, Keiji Nagata, Akihiko Nagano | 1996-11-26 |
| 5579080 | Camera including an apparatus for detecting a line of sight | Akira Yamada, Akihiko Nagano | 1996-11-26 |
| 5541400 | Accumulation control apparatus for photoelectric conversion element and visual axis detection apparatus using the element | Shinichi Hagiwara, Akira Yamada | 1996-07-30 |
| 5485241 | Optical equipment with device for detecting direction of visual axis | Akira Yamada, Akihiko Nagano | 1996-01-16 |